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  • Generic Database table design

    - by Gazeth
    Just trying to figure out the best way to design my table for the following scenario: I have several areas in my system (documents, projects, groups and clients) and each of these can have comments logged against them. My question is should I have one table like this: CommentID DocumentID ProjectID GroupID ClientID etc Where only one of the ids will have data and the rest will be NULL or should I have a seperate CommentType table and have my comments table like this: CommentID CommentTypeID ResourceID (this being the id of the project/doc/client) etc My thoughts are that option 2 would be more efficient from an indexing point of view?

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  • Returning Null values with COUNT

    - by Randy B.
    With this query, I get a result that is two short of the table because they are not included in count, and I would like get the NULL values in the result. To do this, I am pretty sure I need to use a subquery of some kind, but I am not sure how, since the attribute in question is an aggregate. SELECT Equipment.SerialNo , Name, COUNT(Assignment.SerialNo) FROM Equipment INNER JOIN Assignment ON Assignment.SerialNo = Equipment.SerialNo GROUP BY Equipment.SerialNo, Name

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  • SQL - Conditionally evaluate WHERE clauses

    - by Crimius
    I need to get a WHERE clause to only evaluate certain statements. something like: WHERE field_a = field_b AND (CASE WHEN <PARAM>type</PARAM> = 5 THEN {field_c = 1 OR field_c = 2} WHEN <PARAM>type</PARAM> = 6 THEN {field_c = 3 OR field_c = 4} ELSE field_c = <PARAM>type</PARAM> so that when the Param type = 5, it only checks if field_c = 1 or 2. Any thoughts?

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  • help with sql-server query - dates

    - by Gold
    hi i have this table: id|date 1 | 10/11/2009 2 | 13/11/2009 1 | 20/12/2009 3 | 21/12/2009 1 | 30/12/2009 if i stand on the last record (id=1) and i need to see the last date where id=1 is appear -- will show me: 1 | 20/12/2009 what query will do it ? thank's in advance

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  • Arabic SQL query (on Oracle DB) returns empty result

    - by unprecedented
    I have this query (that runs on Oracle 10g database): SELECT ge.*, ge.concept AS glossarypivot FROM s_glossary_entries ge WHERE (ge.glossaryid = '161' OR ge.sourceglossaryid = '161') AND (ge.approved != 0 OR ge.userid = 361) AND concept = '?' ORDER BY ge.concept The query must display all words that begin with the arabic letter "?" but unfortunately, it returns empty result .. However, if I run the same query on the same database which runs on MYSQL, it works well and displays the correct result .. What should I do in order to get this query working the right way on oracle 10 database? P.S. the oracle database character set is : "AL32UTF8" thank you so much in advance

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  • Help with this JET Sql Query [SOLVED]

    - by yae
    Hi: I need help to do this query select. for example I have these fields: idInvoice date amount Depending of the date I need multiply the field "amount" for x number or other one. For example, if the date is less 01/01/2010 to multiply for 20 . But if it is major or equal to multiply for 35 Select idInvoice, date, amount, amount * varNumber from invoices

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  • SQL insert default value

    - by Stan
    Say if I have a table like CREATE TABLE [Message] ( [MessageIdx] [int] IDENTITY (1, 1) NOT NULL , [Message] [varchar] (1024) COLLATE Latin1_General_CI_AS NOT NULL , [ValidUntil] [datetime] NULL , CONSTRAINT [PK_Message] PRIMARY KEY CLUSTERED ( [MessageIdx] ) WITH FILLFACTOR = 90 ON [PRIMARY] ) ON [PRIMARY] GO I am trying to insert value without specify column names explicitly. Below statement causes error. How can I do that? Thanks. set identity_insert caconfig..fxmessage on; insert into message values (DEFAULT,'blah',DEFAULT); set identity_insert caconfig..fxmessage off;

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  • Java: Do something on event in SQL Database?

    - by wretrOvian
    Hello I'm building an application with distributed parts. Meaning, while one part (writer) maybe inserting, updating information to a database, the other part (reader) is reading off and acting on that information. Now, i wish to trigger an action event in the reader and reload information from the DB whenever i insert something from the writer. Is there a simple way about this? Would this be a good idea? : // READER while(true) { connect(); // reload info from DB executeQuery("select * from foo"); disconnect(); }

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  • best practises to delete a set of tables in sql 2008

    - by Hari
    Basically i want to keep the transaction very simple but i should be able to rollback if any error in the later part. Something like mentioned below, BEGIN TRANSACTION DELETE SET 1(this will delete first set of table) COMMIT DELETE SET 2 (will delete second set of table) If any error occurs while deleting set 2 i should be able to rollback set 1 transaction as well.Let me know if we have any options to do like this. Appreciate for your help.

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  • Relating categories with tags using SQL

    - by Pablo
    I want be able to find tags of items under the a certain category. Following is example of my database design: images +----------+-----+-------------+-----+ | image_id | ... | category_id | ... | +----------+-----+-------------+-----+ | 1 | ... | 11 | ... | +----------+-----+-------------+-----+ | 2 | ... | 12 | ... | +----------+-----+-------------+-----+ | 3 | ... | 11 | ... | +----------+-----+-------------+-----+ | 4 | ... | 11 | ... | +----------+-----+-------------+-----+ images_tags +----------+--------+ | image_id | tag_id | +----------+--------+ | 1 | 53 | +----------+--------+ | 3 | 54 | +----------+--------+ | 2 | 55 | +----------+--------+ | 1 | 56 | +----------+--------+ | 4 | 57 | +----------+--------+ tags and categories each have their own table relating the id to an actual name(text). So my question is how will i find out that images with category_id=11 have have the tag_id 53 54 55 56 57. In other words how to find the tags that images in certain category have?

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  • Prioritize SQL WHERE clause

    - by JaTochNietDan
    Basically I want to do this: SELECT * FROM `table` WHERE x = 'hello' OR x = 'bye' LIMIT 1'; I want it to return 1 value, but to prioritize results from the 1st where clause. So if there exists a row where column x's value is "hello", it will not return the result from the 'bye' value. If the "hello" value doesn't exist though, it will return the result from the 'bye' value. Can't figure out a way to do it even though it seems fairly trivial. Any ideas?

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  • Problem in removing hardcoded values using temp table...

    - by Shahsra
    Hi All, First of all Wish u all Happy New Year. I have a problem in writing query. While executing my query I am getting an error. Query: select case when S.R1 = '6' then 5 when S.R1 = '7' then 6 when S.R1 = '8' then 7 when S.R1 = '9' then 8 when S.R1 ='10' then 9 else S.R1 end as Q FROM [HelpService].[dbo].[help] s ----------------------------------------------- SELECT [Source], [Score] INTO #Temp_Q FROM [HelpDesk].[dbo].[Survey] WHERE [data_Source Name] = 'Text Data' ----------------------------------------------- select CONVERT(REAL, a.[Dell Score]) as Q FROM [HelpService].[dbo].[help] s LEFT OUTER JOIN #CE_Temp_Q a on s.[R1] = a.[Source] ERROR Msg 8114, Level 16, State 5, Line 1 Error converting data type varchar to real. What I am asked to do is I need to remove the hard coded values and need to write queries with a temp table. Thanks in Advance, Shashra

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  • How to run stored procedure 1000 times

    - by subt13
    I have a stored procedure that I'm using to populate a table with about 60 columns. I have genereated 1000 exec statements that look like this: exec PopulateCVCSTAdvancement 174, 213, 1, 0, 7365 exec PopulateCVCSTAdvancement 174, 214, 1, 0, 7365 exec PopulateCVCSTAdvancement 175, 213, 0, 0, 7365 Each time the stored procedure will be inserting anywhere from 1 to 3,000 records (usually around 2,000 records). The "server" is running desktop hardware with 4 gigs of available memory on a server OS. The problem I have is that after the first 10-15 executes of an average of 1-2 seconds each time, the next 10-15 seem to never finish. Am I doing this correctly? How should I do this? Thanks! Top 10 waiters: LAZYWRITER_SLEEP SQLTRACE_INCREMENTAL_FLUSH_SLEEP REQUEST_FOR_DEADLOCK_SEARCH XE_TIMER_EVENT FT_IFTS_SCHEDULER_IDLE_WAIT CHECKPOINT_QUEUE LOGMGR_QUEUE SLEEP_TASK BROKER_TO_FLUSH BROKER_TASK_STOP

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  • How to avoid Foreign Keys constraints for all tables in DB truncate ?

    - by eugeneK
    Hi, for designing purposes i need to truncate all DB which has lots of FK's. I cannot use DELETE command simply because some tables set with Identity of TinyInts and contain about 150 items. this is a query ( truncate all tables in selected DB ) i'm trying to run Declare @t varchar (1024) Declare tbl_cur cursor for select TABLE_NAME from INFORMATION_SCHEMA.TABLES WHERE TABLE_TYPE = 'BASE TABLE' OPEN tbl_cur FETCH NEXT from tbl_cur INTO @t WHILE @@FETCH_STATUS = 0 BEGIN EXEC ('TRUNCATE TABLE '+ @t) FETCH NEXT from tbl_cur INTO @t END CLOSE tbl_cur DEALLOCATE tbl_Cur What the best and easiest way to achieve truncate on DB with many FK's ?

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  • SQL SELECT INSERTed data from Table

    - by Noam Smadja
    its in ASP Classic. MS-Access DB. i do: INSERT INTO Orders (userId) VALUES (123)" what i want to retrieve is orderNumber from that row. its an auto-increment number. so i did: SELECT orderNumber FROM Orders WHERE userId=123 but since it is on the same page, the SELECT returns: Either BOF or EOF is True, or the current record has been deleted. Requested operation requires a current record. i've seen somewhere RETURNING orderNumber as variable but it was for oracle and i dont know how to implement it into my asp :( set addOrder = Server.CreateObject("ADODB.Command") addOrder.ActiveConnection = MM_KerenDB_STRING addOrder.CommandText = "INSERT INTO Orders (userId) VALUES ("&userId&")" addOrder.CommandType = 1 addOrder.CommandTimeout = 0 addOrder.Prepared = true addOrder.Execute() Dim getOrderNumber Set getOrderNumber = Server.CreateObject("ADODB.Recordset") getOrderNumber.ActiveConnection = MM_KerenDB_STRING getOrderNumber.Source = "SELECT orderNumber FROM Orders WHERE userId=" & userId getOrderNumber.CursorType = 0 getOrderNumber.CursorLocation = 2 getOrderNumber.LockType = 1 getOrderNumber.Open() session("orderNumber") = getOrderNumber.Fields.Item("orderNumber").value

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  • sql select from a large number of IDs

    - by Claudiu
    I have a table, Foo. I run a query on Foo to get the ids from a subset of Foo. I then want to run a more complicated set of queries, but only on those IDs. Is there an efficient way to do this? The best I can think of is creating a query such as: SELECT ... --complicated stuff WHERE ... --more stuff AND id IN (1, 2, 3, 9, 413, 4324, ..., 939393) That is, I construct a huge "IN" clause. Is this efficient? Is there a more efficient way of doing this, or is the only way to JOIN with the inital query that gets the IDs? If it helps, I'm using SQLObject to connect to a PostgreSQL database, and I have access to the cursor that executed the query to get all the IDs.

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  • SQL select from last inserted

    - by arik-so
    Hello, in MySQL, I have table. One column has auto-increment. When I insert something mysql_query('INSERT INTO `table` SET `column` = "data";'); Now, what I want is, without further queries, to get the value of the auto-incrementing column, maybe like this: mysql_query('insertion = (INSERT INTO `table` SET `column` = "data"); SELECT `auto_incrementing_column` FROM `table`.insertion'); Please tell me how something like that is done. Thanks in advance!

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  • SQL is this equivalent to a LEFT JoIn?

    - by Jim
    Is this equivalent to a LEFT JOIN? SELECT DISTINCT a.name, b.name FROM tableA a, (SELECT DISTINCT name FROM tableB) as b It seems as though there is no link between the two tables. Is there an easier / more efficient way to write this?

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  • Historical Rolling Daily sum

    - by user2980057
    I have a table of consisting of Dates and the amount of revenue recorded for that day going back for about 12 years. What I would like to do with this data is create a new table with Dates and prior 7-day revenue numbers. Any guidance would be greatly appreciated. Below is an example of what my source table and what my results would need to look like.... Source Table.. DATE | Revenue 12/31/2013 | 200 12/30/2013 | 300 12/29/2013 | 400 12/28/2013 | 100 12/27/2013 | 200 12/26/2013 | 150 12/25/2013 | 350 12/24/2013 | 450 12/23/2013 | 200 12/22/2013 | 300 12/21/2013 | 100 12/20/2013 | 300 Resulting Table... DATE | 7Dayrev 12/31/2013 | 1700 12/30/2013 | 1950 12/29/2013 | 1850 12/28/2013 | 1750 12/27/2013 | 1750 12/26/2013 | 1850 ETC......

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